For headlines from Ballbug, use "bbwidget" in place of "wswidget" in the above code.
Likewise, for memeorandom or tech.memeorandum headlines, use "pwidget" or "twidget", respectively.
Note that the widget will shrink to fit your sidebar, which likely is narrower than the above box.

Livlier colors than gray are available as well.
Just change the word gray in the Javascript snippet to
blue,
green,
tan, or
white. Or even style it yourself, as explained in the
earlier post.